Benzimidazole, 250mg

EN 15721 Internal Standard Stock Solution, procedure B 1382.2 Ethanol 16mL 8919.5 4-Methyl-2-pentanol 160µL Gives a concentration of approx. 8mg/mL

delta-HCH, 100 µg/ml, Acetonitrile, 5ml

Emodin 8-glucoside, >90%, 10mg